学步园

 //设置上传文件路径
       // def webRootDir = servletContext.getRealPath("/");
        ConfigObject configObject = ConfigurationHolder.getConfig()   //读取配置文件的保存路径
        def webRootDir =configObject.getProperty("uploadFileConfig").URLconfig;
        def userDir = new File(webRootDir, "/upload");
        //println("保存文件路径："+userDir);
        userDir.mkdirs()

         //获取上传文件
          if(params.dFileNum)
          {
             int fileInputnum=Integer.parseInt(params.dFileNum);               //页面文件控件数量

              fileInputnum=fileInputnum+1;
             for(int a=1;a<fileInputnum;a++)
             {
                 def fileControl="dFileurl"+a;
              // println("控件名：--"+fileControl+"------");
                 def uploadedFile = request.getFile(fileControl);
                    //文件上传操作
                     if(!uploadedFile.empty)
                     {
      //                    println "Class: ${uploadedFile.class}"
//                 println "Name: ${uploadedFile.name}"
//                    println "OriginalFileName: ${uploadedFile.originalFilename}"
//                    println "Size: ${uploadedFile.size}"
//                    println "ContentType: ${uploadedFile.contentType}"
                       //判断文档大小
                       if( uploadedFile.size>10571168)
                       {
                         flash.message ="文档不能超过10M，请重新上传";
                           params.dFileNum=0;
                         render(view: "create", model: [articleInstance: articleInstance])
                         return;
                       }
                       //   println("文件"+a+"名字:"+uploadedFile.originalFilename);

                    //保存文件名和文件路径
                    def fileName=uploadedFile.originalFilename;
                    def fileID=new Random().nextInt(1000000);
                    def saveFileName=fileID+"${fileName[fileName.lastIndexOf('.')..-1]}"

                     //执行上传文件操作
                    uploadedFile.transferTo( new File( userDir,saveFileName))

                       if(articleInstance.durlName)
                            articleInstance.durlName =articleInstance.durlName + fileName+",";
                        else
                            articleInstance.durlName = fileName+",";

                        if(articleInstance.durl)
                              articleInstance.durl = articleInstance.durl+ saveFileName+",";
                         else
                              articleInstance.durl = saveFileName+",";

                     }
                }
            }

文件保存需要在数据库建立两个字段：durl 、durlName ，分别用来保存文件的原名和保存在服务器的名字，用"，"分割

PS：

  //判断上传文件格式

          switch(uploadedFile.contentType){

          case "application/x-zip-compressed": documentInstance.dformat ="rar";break;

          case "application/msword": documentInstance.dformat ="doc";break;

          case "text/plain": documentInstance.dformat ="txt";break;

          case "application/vnd.ms-powerpoint": documentInstance.dformat ="ppt";break;

          case "application/vnd.visio": documentInstance.dformat ="visio";break;

          case "application/vnd.ms-excel": documentInstance.dformat ="xls";;break;

          case "image/gif": documentInstance.dformat ="gif";break;

          case "image/pjpeg": documentInstance.dformat ="jpg";break;

        }

        //判断文档格式是否正确

        if( documentInstance.dformat==null)

        {

          print "不支持的上传文件格式";

          flash.message ="不支持的上传文件格式:"+uploadedFile.contentType;

          render(view: "create", model: [documentInstance: documentInstance])

          return;

        }